Homostasis Flashcards

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1
Q

What is homeostasis

A

ability to regulate internal conditions so reactions can happen at optimal rates

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2
Q

what does the body need to regulate

A

blood glucose concentration
internal temperature
water levels

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3
Q

what happens in the nervous system

A

receptor detects change due to a stimulus where electrical impulses are sent to the spine via sensory neurons. then to the brain where sends a response to the effector by the motor neurons where a response is carried out

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4
Q

what are the signals between neurons called

A

synapses

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5
Q

how do electrical impulses get passed between cells

A

electrical impulses are temporarily changed into chemical signals called neurotransmitters

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6
Q

what happens during a reflex

A

receptors detect stimulus where sensory neurons send electrical impulses to the spine where the relay neuron passes impulses into the motor neuron which passes into the effector and a response is carried out

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7
Q

What is the endocrine system

A

glands that secrete hormones to send signals to effectors via the blood

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8
Q

what does the pituitary gland do

A

sends signals to other glands

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9
Q

what does the thyroid gland do

A

controls the growth and metabolism

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10
Q

what does the pancreas do

A

releases insulin and glucagon which regulate blood sugar levels

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11
Q

what does the adrenal gland do

A

releases adrenaline which increases breathing rate and heart rate to prepare for fight or flight

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12
Q

ovaries and testies

A

releases sperm,eggs and hormones

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13
Q

what is a hormone

A

a chemical messenger secreated by the glands into the bloodstream to get to a target organ

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14
Q

how do synapses work

A

electrical impulses arrive at the synapse they are then turned into a chemical called neurotransmitters and are diffused across and bind to a receptor they are then turned back into an electrical impulse.

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15
Q

What are random errors

A

Using equipement incorrectly
Caused by variation in condition
Take a mean

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16
Q

What are systematic errors

A

Result differs from the true value by a consistent amount each reading

Shows conditions are different