B3- Nerves, hormones and homeostasis

Question 1

Sensory neuron

Answer 1

Receptors to CNS

Question 2

Relay neuron

Answer 2

sensory to motor neuron

Question 3

Motor neuron

Answer 3

CNS to effector

Question 4

CNS

Answer 4

Brain and spinal cord

Question 5

Effectors

Answer 5

muscles and glands

Question 6

Whats the route of a reflex called?

Answer 6

Reflex arc

Question 7

How does ecstasy work?

Answer 7

block sites in synapses where seratonin is removed
(affects pain, agressions, appetite and mood)
concentration increases

Question 8

Role of kidneys

Answer 8

remove urea from blood
adjust ions in blood
adjust water content of blood

Question 9

What are nephrons?

Answer 9

filtrations units in the kidneys

Question 10

Ultrafiltration in kidney

Answer 10

water, urea, ions and sugar go into bowman’s capsule

membranes between vessels and bowman’s capsule act like filters

Question 11

Reabsorption in the kidney

Answer 11

useful substances absorbed back into the blood
eg sugar and sufficient ions by active transport
water

Question 12

Release of wastes in kidney

Answer 12

come out of nephron into the ureter and down to bladder

Question 13

What is the concentration of urine controlled by?

Answer 13

ADH from pituitary gland = more= more water absorption

Question 14

What does alcohol do to ADH?

Answer 14

Suppresses its production, kidneys absorb less water