Notes, summaries, assignments, exams, and exercises for Biology for Primary education

Common Knee Injuries

Knee Plica

Fetal knee development involves three chambers that typically merge into one. The internal walls (plica) separating these chambers may persist. While often asymptomatic, the medio-patellar plica is most prone to causing issues. Symptoms can mimic meniscus injury, leading to catching and locking sensations.

Patellar Subluxation and Dislocation

Occurs at the patellofemoral joint, with lateral dislocations being the most common.

Knee Joint Dislocation

Occurs at the tibiofemoral joint and often involves tears of the MCL, ACL, LCL, and joint capsule.

Patellar Tendon Rupture

A complete tear of the quadriceps or patellar tendon, typically at its attachment to the patella.

Medial and Lateral Collateral Ligament Injuries

• Medial

Pharmacology 2

Dependence: physical response, addiction: behavioral.

Pharmacodynamic principle Placebo effect: patient experiencing relief of symptoms or effect that cannot be attributed to medication. Receptor theory; receptor site, binding site for drug molecule, lock & key. Responses agonist(enhances support encourages response) antagonist( inhibits response drug fits receptor but fails to initiate) neutral(no response). Dose response relationship: inc drug concentration =inc potential receptor site=inc biological effect. Steady state: maintaining blood levels within therapeutic range.

Anti-inflammatories: Steroids: end in -one. NSAIDS: selective(COX2 inhibit celebrex) non selective: upset stomach (salicylates, propionic acid, enolic acid,...

Energy: Capacity for Change

Potential Energy: Stored energy.

Kinetic Energy: Energy from motion.

Conservation of Energy: Energy cannot be created or destroyed.

Heat: A usually random form of energy.

Entropy: A measure of disorder or randomness.

Chemical Energy: Energy stored in chemical bonds, such as food.

ATP Molecule

Draw a molecule of ATP: Adenosine-P-P-P

Metabolism

Metabolism: The total of all chemical reactions in an organism, requiring enzymes.

ATP and Cellular Work

ATP energy helps cells perform three types of work:

1. Chemical: Assists chemical reactions.
2. Transport: Performs transport work.
3. Mechanical: Moves muscle fibers, for example.

Enzyme Assistance

How do enzymes assist in chemical reactions?

1. Enzymes provide an active site specific to a substrate

Bacterial Identification Using Culture Media

1. Define:

   1. Selective Medium

      A selective medium favors the growth of specific microorganisms while inhibiting others. Examples include:

      • MAC agar (MacConkey agar)
      • Mannitol salt agar
      • Eosin methylene blue agar (EMB)

2. 2. Differential Medium

      A differential medium distinguishes between microorganisms based on their biochemical reactions. Examples include:

      • MAC agar
      • Blood agar
      • Mannitol salt agar
      • Eosin methylene blue agar

MacConkey (MAC) Agar

• MacConkey agar selects for which group of bacteria? Explain.
  • Gram-negative bacteria.
• MacConkey agar media differentiates between enteric bacteria based on what biochemical reaction? Explain.
  • Lactose fermentation (presence or absence of lactase enzyme).
• If the organism is E. coli, what would you

Arthropod Characteristics: Defining Features

Arthropods are defined by the following characteristics:

• Segmented body structure
• Coelomate (possessing a true coelom)
• Invertebrate
• Bilateral symmetry
• Exoskeleton with jointed appendages

Arthropods were the earliest known invertebrates to have jointed appendages, which allows for flexibility despite having a hard exoskeleton.

The Arthropod Exoskeleton

The exoskeleton is a hard, outer covering made of chitin and protein.

Functions of the Exoskeleton

• Protects and supports internal structures.
• Allows for the attachment of muscles.

Molting

Exoskeletons cannot grow, so they must be replaced throughout life, a process known as molting.

Body Segmentation

Most arthropods exhibit three primary segments: the head, thorax,...

Evolutionary Concepts and Theories

Pre-Evolutionary Ideas

Before modern evolutionary theory, several ideas attempted to explain the diversity of life:

• Fixism: This theory posited that species remain unchanged since their divine creation.
• Catastrophism: Proposed that Earth's history was shaped by sudden, short-lived, violent events, leading to the extinction of species, after which new species would appear.

Key Evolutionary Theories

Lamarckism: Inheritance of Acquired Characteristics

Jean-Baptiste Lamarck proposed that living organisms change throughout history. His theory was based on the following principles:

• Tendency Towards Perfection: Living things strive for perfection.
• Adaptation to Environment: Organisms adapt to their environment, and environmental

How the Human Body Perceives and Reacts

Humans constantly interact with their environment. This interaction is facilitated by complex relational functions.

These functions are carried out through three main types of components:

• Receivers
• Controllers
• Effectors

Receivers: Our Sensory Organs

Receivers are our sensory organs. They capture what happens outside or inside the body and send this information to the control center.

Controllers: The Nervous System

Controllers are the organs of the nervous system.

The Brain (Cerebrum)

Located within the cranium, the brain receives information from receptors, interprets and relates it, prepares response commands, stores information in memory, and coordinates all the body's organs.

The Spinal Cord

Situated within the...

The Skeletal System: The Internal Framework of the Body

The skeletal system is the internal framework (structure) of the body. It is made up of 206 bones and tissue.

Support

Bones hold our body and give us shape. For example, the spinal cord provides support.

Protection

The skeleton protects our vital organs. For instance, the skull protects the brain, and the ribs protect our heart and lungs.

Movement

Bones allow us to move as a whole body or as individual parts.

Blood Production

Certain bones in the skeleton contain red bone marrow, which produces red blood cells, white blood cells, and platelets.

Storage

Our bones can store different minerals, such as calcium.

Endocrine Regulation

Endocrine glands produce hormones, and the skeletal system helps regulate...

blood circulation: closed: blood always circulates through the blood vessels and never leaves them. double: blood must flow through the heart twice to complete a circuit. oxygenated and deoxygenated blood never mix. they circulate through different circuits. systematic and pulmonary circuits: VI>CU>AD> VD> PUL>AI

Neurology: Anatomy and Physiology Fundamentals

Anatomy of the Nervous System

Central Nervous System (CNS)

• Brain: Cerebrum, Diencephalon, Cerebellum, Brain Stem
• Spinal Cord

Peripheral Nervous System (PNS)

• Spinal Nerves
• Peripheral Nerves

Supporting Structures

• Meninges: Membranes surrounding the brain and spinal cord
• Cerebrospinal Fluid (CSF)

Physiology of the Nervous System

Peripheral Nervous System (PNS) Functions

• Autonomic Nervous System:
  • Sympathetic (Adrenergic)
  • Parasympathetic (Cholinergic)
• Somatic Nervous System

Central Nervous System (CNS) Functions

• Cerebrum & Diencephalon: Higher cognitive functions
• Cerebellum: Helps with movement coordination
• Brain Stem: Regulates vital functions like temperature, blood pressure, and heart rate

Common Neurological Signs