Bio IB Topic 6.5-6

A.

B.

C.

D.

Sodium channels open and sodium ions diffuse out of the neuron

Potassium channels open and potassium ions diffuse into the neuron

Potassium channels open and potassium ions diffuse out of the neuron

Sodium channels open and sodium ions diffuse into the neuron

Beta-cells of the pancreas

Cells of the liver

Alpha-cells of the pancreas

Epithelial cells of the intestine

Ovary

Testis

Pituitary gland

Placenta

Estrogen

FSH

LH

Oxytocin

Propagates an action potential by pumping sodium ions across the membrane out of the neurone.

Propagates an action potential by pumping sodium ions across the membrane into the neurone.

Initiates the action potential needed for the transmission of an impulse by pumping calcium ions out of the endoplasmic reticulum.

Establishes the resting potential needed for the transmission of an impulse by pumping sodium and potassium ions across the membrane.

II only

I and II only

II and III only

I, II and III

Testis tissue has a layer of muscle fibres and ovary tissue does not.

Testis tissue is cooler than ovary tissue.

Testis tissue contains tubules and ovary tissue does not.

Testis tissue contains pain receptors and ovary tissue does not.

LH, progesterone, FSH, estrogen

FSH, progesterone, LH, estrogen

LH, estrogen, FSH, progesterone

FSH, estrogen, LH, progesterone

In vitro fertilization involves artificial injection of sperm into the uterus

In vitro fertilization only involves one parent

In vitro fertilization happens outside the body

In vitro fertilization uses stem cells instead of eggs