What are the primary functions of the skin?
Skin is one fo the largest organs in the body, in surface area and weight. The skins has two layers. The epidermis and dermis. One of the primary function of the skin is to act as a barrier. It provides, mechincal impacts and pressure, different temperture, chemeicals.
In the box below, explain the function of these parts of the brain
Brain stem
Brain stem mainly deals with cardiac and respiratory functions; regulating heart rate, breathing, sleeping, and eating.
Cerebellum
Main functions are to receive information from sensory system; by regulating motor movements, posture, balance, coordination and speech.
Thalamus and hypothalamus
Thalamus’s main function is to do with rely an sensory information. It also plays great importance in sleep pattern.
Hypothalamus regulates metabolism, hunger, thirst, fatigue, anger, and circadian cycle.
Cerebrum
Largest part of the human brain. Its main functions are to determine intelligence, personality, thinking, perceiving, producing and understanding language, sensory impulses and motor functions.
Use the table below to explain hormones that are produced and what their function is in the body
Organ
Hormone
Function
Pituitary gland
Follicles stimulating hormone
(FSH)
Triggers egg ripening and oestrogen production in ovaries.
Hypothalamus
Anti-diuretic hormone, oxytocin.
One of the main functions of homeostasis, to keep the human body stable, constant conditions.
It also response to daily stress, by releasing melatonin.
Pancreas
Insulin
Produces insulin which controls blood sugar level.
Adrenal glands
ACTH
Adrenocorticotropic hormone
Stimulates the adrenal gland to produce a hormone called cortisol. Which produces adrenaline which prepare the body for rapid activity by increasing the heart rate, and rate of sugar levels in blood and diverting blood to muscles and brain.
Testes
LH&FSH
Interstitial cell Stimulating hormone.
Control reproductive functioning and sexual characteristics. Also produces testosterone which causes the changes at puberty and stimulates sperm production.
Ovaries
LH& FSH
Oestrogen and Progesterone
Controls reproductive functioning and sexual characteristics.
Use the table below to explain what happens at each stage of digestion. Include relevant enzymes and their action in your explanation.
Mouth
The mouth is the beginning of the digestive area; and, in fact, digestion starts here when taking the first bite of food. Chewing breaks the food into pieces that are more easily digested, while saliva mixes with food to begin the process of breaking it down into a form your body can absorb and use. The enzymes present are salvia.
Stomach
The stomach is a hollow organ, or "container," that holds food while it is being mixed with enzymes that continue the process of breaking down food into a functioning form. Cells in the lining of the stomach secrete strong acid and powerful enzymes that are responsible for the breakdown process. When the contents of the stomach are sufficiently processed, they are released into the small intestine
Amylase is the enzyme that breaks down carbohydrates. protease enzymes released into the stomach
Small intestine
Made up of three sections — the duodenum, jejunum, and ileum — the small intestine is a 22-foot long muscular tube that breaks down food using enzymes on the loose by the pancreas and bile from the liver. Peristalsis also is at work in this organ, moving food through and mixing it with digestive excretions from the pancreas and liver. The duodenum is largely responsible for the continuous breaking-down process, with the jejunum and ileum mainly responsible for absorption of nutrients into the bloodstream.
Enzymes in here are, lactase (breaks down
