Tissue Structure And Function
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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What type of control is exhibited in smooth muscle?
Involuntary control
Where can smooth muscle be found?
In the walls of hollow organs such as the stomach and bladder.
What’s the proteins in muscle fibres called?
Actin and myosin
What’s a myelin sheath and what cells is it made from?
Schwann cells form the myelin sheath and this acts as an insulator to stop the electrical signal from leaving the cell too soon
What is the sarcomere?
Unit of contraction between muscle fibres
What are excitatory nerve impulses
Propagates (produces) impulses and stimulates brain
What are inhibitory nerve impulses?
Inhibits impulses and calms the brain
What is acetylcholine and roles?
Chief neurotransmitter Controls muscles Dilates blood vessels Controls heart heart
What is homestasis?
Maintain internal environment despite external examples
What is thermoregulation?
Regulation of temp
What is osmoregulation?
Regulation of water
What temperature do enzymes work best at?
37 degrees Celsius
What is ADH?
Anti diuretic hormone
Where are the osmoreceptors?
In the hypothalamus
What gland produces ADH?
Pituitary gland
What does ADH do?
Causes the kidneys to absorb water, to keep water in the body
What does less ADH mean?
Less absorption of water so more urine produced
What are the main facts of capillaries?
One cell thick Diffusion of oxygen and minerals to cells Microscopic vessels Take waste products away
What detects changes in blood temperature
The brain
What is sarcoplasmic reticulum responsible for?
Stores calcium ions which controls ATPase activity so this controls the contraction of muscles
What is the H zone
Myosin only
What is the Z line
Different sarcomere, line/space between them
What is the A band?
Both actin and myosin Must overlap to contract
What is the M line?
Holds together the myosin filament and actin