Human Physiology
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
The Nervous System
SubtopicThe Nervous System under Human Physiology for Grade 9 IB.
Preview questions (no answers)
- 1.
What are the branched structures at the very end of an axon called?
A.Dendrites
B.Cell bodies
C.Axon terminals
D.Nuclei
- 2.
What happens to neurotransmitters after they are released into the synapse?
A.They turn into electrical impulses
B.They bind to receptors on the next neuron
C.They enter the bloodstream
D.They are converted into hormones
- 3.
The 'knee-jerk' response is a classic example of a:
A.Voluntary action
B.Reflex arc
C.Learned behavior
D.Thought process
Download the worksheet for Human Physiology - The Nervous System to practice offline. It includes additional chapter-level practice questions.
Hormones and the Endocrine System
SubtopicHormones and the Endocrine System under Human Physiology for Grade 9 IB.
Preview questions (no answers)
- 1.
Puberty is a period of rapid growth and change triggered by an increase in which type of chemicals?
A.Enzymes
B.Hormones
C.Antibodies
D.Vitamins
- 2.
Which organ is the main target for glucagon when the body needs to release stored sugar?
A.The brain
B.The liver
C.The lungs
D.The heart
- 3.
Compared to nervous signals, the effects of hormones are generally:
A.Temporary and very short
B.Lasting for a longer period of time
C.Instantaneous
D.Electrical in nature
Download the worksheet for Human Physiology - Hormones and the Endocrine System to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
What is the primary function of the urinary system in homeostasis?
A.To break down food
B.To remove metabolic waste and balance water
C.To produce red blood cells
D.To pump blood to the lungs
- 2.
Which of these best describes 'osmoconformers' versus 'osmoregulators'?
A.Osmoregulators keep internal salt levels constant
B.Osmoconformers live only in fresh water
C.Osmoregulators change with the environment
D.Humans are osmoconformers
- 3.
In a feedback loop, which component detects the stimulus?
A.Effector
B.Control center
C.Receptor
D.Hormone
Download the worksheet for Human Physiology - Homeostasis to practice offline. It includes additional chapter-level practice questions.
The Circulatory and Respiratory Systems
SubtopicThe Circulatory and Respiratory Systems under Human Physiology for Grade 9 IB.
Preview questions (no answers)
- 1.
What is the name of the group of cells in the right atrium that acts as the heart's natural pacemaker?
A.Sinoatrial (SA) node
B.Valve node
C.Capillary bed
D.Aorta base
- 2.
Compared to veins, how are the walls of arteries generally described?
A.Thinner and less elastic
B.Thicker and more elastic
C.The same thickness
D.Non-existent
- 3.
What is the scientific term for the process of moving air into and out of the lungs?
A.Excretion
B.Ventilation
C.Digestion
D.Absorption
Download the worksheet for Human Physiology - The Circulatory and Respiratory Systems to practice offline. It includes additional chapter-level practice questions.