Worksheets2019 brain practice session 1
Total questions: 20
Worksheet time: 11mins
The human brain is made of 100 billion neurons. Each neuron has a nucleus that contains genes. Many neurons bind together to form a nerve.
tissue
system
organ
cell
Humans feel hungry when their empty stomachs contract and glucose levels in their body drop. Both of the situations stimulate neurons that send messages to the brain which are interpreted as hunger. What body systems are involved in this process as described?
digestive, muscular, integumentary, and respiratory
digestive, excretory, integumentary, and skeletal
circulatory, excretory, nervous, and skeletal
circulatory, digestive, muscular, and nervous
The urinary bladder is a muscular organ of the excretory system that collects urine excreted by the kidney. How does the nervous system help the urinary system in excretion?
it signals the urinary bladder to absorb more water from the urine.
It signals the urinary system to collect waste from the different parts of the body.
It signals the urinary bladder to hold and release urine at appropriate times.
It signals the urinary bladder to allow more urine to flow from the ureters.
