Notes, summaries, assignments, exams, and exercises for Biology for Vocational training

Functions of Muscle Tissue

• Production of body movements
• Stabilization of posture
• Volume regulation of the body
• Movement of chemicals in the body
• Production of heat

Properties of Muscle Tissue

• Electrical excitability
• Contractility
• Extensibility
• Elasticity

Types of Muscle Tissue

There are three types of muscle tissue: striated skeletal, striated cardiac, and smooth.

• Striated skeletal muscle: Called skeletal because the function of these muscles is to move the bones; it often works on a voluntary basis.
• Heart muscle (myocardium): Is located in the heart and is part of its wall. Its movement is involuntary.
• Smooth muscle: Is part of the walls of blood vessels, airways, and some guts. Almost always, this type of muscle movement is involuntary.

Structure of Striated

1. Functions of the Digestive System

Digestion and absorption of nutrients.

2. Elements Forming the Small Intestine

Duodenum, jejunum, and ileum.

3. Valves of the Stomach

The stomach has the pyloric valve, and the duodenum connects with the esophagus via the cardia.

4. Portions of the Large Intestine

The large intestine is divided into the following parts:

• The first portion consists of a blind sac.
• The second part is called the ascending colon.
• The third portion is the transverse colon.
• The fourth part is the descending colon.
• Finally, the sigmoid colon, rectum, and anus.

5. Intestinal Loops

Intestinal loops are folds that form the small intestine to adapt to the available space in the abdomen.

6. Gastrointestinal Annexes

These include the parotid salivary...

Cerebral Palsy (CP): An Overview

Moss Theory and 2 Examples

• Growth of face happens as response to functional needs and neurotrophic influences and is mediated via soft tissues in which jaws are embedded.
• Soft tissue growth causes both bone and cartilage to react.
• Growth of cranial vault is a direct response to growth of brain.
• Growth of eyes increases size of orbit.
• Major determinant of growth of maxilla and mandible is enlargement of nasal and oral cavities, which grow in response to functional needs. Important for orthodontic treatment with functional appliances and orthopedic treatment.

Fish Characteristics

Fish are scaly aquatic animals, typically spindle-shaped or fusiform vertebrates, that breathe through gills and possess fins.

Fish Classification by Skeleton

Depending on their skeleton, fish are divided into:

• Elasmobranchs: Possess a cartilaginous skeleton, including sharks, rays, and skates.
• Teleosts: Possess a bony skeleton, encompassing all fish that are not sharks, rays, or skates.

Fish Anatomy

Body Regions

Head:

Extends from the front of the fish to the rear edge of the operculum (gill cover bone) in bony fish. In cartilaginous fish, it extends from the front to the last gill slit.

Trunk:

Extends from the edge of the operculum (or last gill slit in cartilaginous fish) to the anal opening.

Caudal Region (Tail):

Extends from the

Crohn's Disease

Crohn's disease is an inflammatory condition of unknown cause, frequently affecting the ileum in young adults. It causes severe diarrhea with a tendency towards fistulization. It is also known as regional enteritis or terminal ileitis.

Clinical Manifestations

Acute Ileitis

Often confused with appendicitis, acute ileitis occurs in children and adolescents.

Chronic Form

• Insidious onset with diarrhea and fever
• Palpable mass
• Fistulas (20% of cases)

General Symptoms

• Pallor
• Depression
• Erratic polyarthritis

Treatment

Treatment involves a combination of medical and surgical approaches.

Acute Pancreatitis

Concept

Acute pancreatitis is an aseptic inflammation of a necroticohemorrhagic nature. It involves autodigestion of the gland by its own enzymes,...

The Human Heart: Anatomy and Function

The heart is an organ about the size of a fist, located in the center of the chest, slightly to the left. It is comprised of two atria and two ventricles. Blood enters the atria through the veins and is driven out of the ventricles through the arteries. The heart has valves that force the blood to circulate in one direction.

The Heartbeat

The beating of the heart is the most noticeable manifestation of its activity. The frequency with which the heart beats varies according to the body's needs. Every heartbeat follows a set of phenomena that constitute a cardiac cycle:

• Atrial systole: The atria contract and push blood into the ventricles.
• Ventricular systole: The ventricles contract, and blood leaves through

Anabolism: The Constructive Phase of Metabolism

Anabolism is the constructive phase of metabolism. It is the set of metabolic pathways whose objective is to obtain more or less complex organic molecules, sharply reduced, from simpler and relatively oxidized ones. Therefore, these are chemical reduction processes.

Features of Anabolic Pathways

• As we have said, they are basically chemical reduction processes.
• Reactions are strongly endergonic (energy is needed), for which they use the energy released in catabolic reactions as ATP, NADH, and NADPH.
• The anabolic pathways for the synthesis of molecules are different from the catabolic ones, although they often share reversible reactions close to equilibrium. There is always some different way on each

21) Osmosis can be defined as

the diffusion of water.

22) A cell that neither gains nor loses water when it is immersed in a solution is

isotonic to its environment.

23) Which of the following processes can move a solute against its concentration gradient?

active transport

24) Which of the following is a typical feature of an ATP-driven active transport mechanism?

The solute moves against the concentration gradient.

25) The process of a white blood cell engulfing a bacterium is

phagocytosis.

26) Which of the following examples is classified as a metabolic pathway?

protein synthesis

27) Which of the following most accurately describes selective permeability?

Only certain molecules can cross a cell membrane.

28) Which of the following would likely move through...

Trigeminal Nerve

The trigeminal nerve controls masticatory muscles. Its sensory fibers receive sensitivity from the face, orbit, nasal cavity, and oral cavity. The trigeminal ganglion (semilunar ganglion/gasserian ganglion) is located anterosuperior to the petrous portion of the temporal bone.

V1 (Ophthalmic Nerve)

V1 is sensory and supplies the front region of the nose, upper eyelid, mucous membranes of the frontal, sphenoid, and ethmoid sinuses, the upper part of the nasal cavity, and the eyeball. V1 has three terminal branches: nasal, frontal, and lacrimal.

Nasal Nerve

• Collateral branches: long ciliary nerve (supplies the eyeball), posterior ethmoidal nerve (supplies the sphenoid sinus, ethmoid cells, and upper portion of the nasal cavity).
• Terminal