homework chapters 11.15-11.23
Which of the following is the correct sequence of structures of the urinary system in the creation to the excretion of urine?
Kidneys, ureter, urinary bladder, and urethra
What type of connective tissue connects bones together?
Ligaments
Which brain structure is the largest and most complex?
The cerebellum
What is the part of the kidney where urine is formed?
The nephron
What is the name of the tubes that run from the kidneys to the bladder?
Ureters
The spinal cord is part of the ________ nervous system.
central
The cerebrum develops from the
forebrain
Which of the following is a type of joint that allows movement only in one direction?
hinges
The ____________________ is the master control center for the endocrine system
hypothalamus
A person who has a stroke that damages the cerebellum might have difficulty ____________
learning and coordinating motor movements
The brain stem consists of the ____________.
midbrain, medulla, and pons
Urine contains of mostly __________.
water
What are the electrical signals generated by neurons called?
Axons
Which of the following statements about bones is false?
Bones are dry and dead, made up of calcium and connective fibers with a few blood vessels running through them.
Which of the following structures of the brain consists of right and left hemispheres?
Cerebrum
The urinary system ________.
Cleanses the blood. Rids the body of wastes. Maintains salt and water balance.
The somatic nervous system would control which of the following?
Kicking a ball into a soccer goal
A _____________________ shortens when sliding filaments move over each other in muscle contraction.
Sarcomere
How do the muscles in your arm extend your arm outward?
Some muscles in your arm relax, and others contract, pulling the arm straight.
What is an action potential?
The electric signal used by neurons to transfer information
Which brain structure controls the secretion of hormones in the rest of the body?
The hypothalamus
The spinal cord is part of the ________ nervous system.
To convey information to and from the central nervous system
What is the purpose of dialysis treatments?
To detoxify dangerous chemicals in the bloodstream
What is the main role of kidneys?
To filter blood and remove toxins from it
What would happen if the sensory neurons in your hand could not transmit a signal?
You could move your fingers but you could not feel something touch them.
The rapid reversal of ions across the plasma membrane of a neuron is known as a(n)
action potential
If the dendrites are the "ears" of a neuron, and the axon is the "mouth" of the neuron, what is the "cell body" analogous to?
brain
In neurons, ____________ receive signals and ____________ transmit signals.
dendrites; axons
Which of the following options lists muscle structures in the correct order from largest to smallest?
muscle, muscle fibers, myofibrils, sarcomeres, thick and thin filaments
What carries a signal from one neuron to the next?
neurotransmitter
What allows for the variable intensity of muscle contractions?
number of motor units activated
Water held behind a dam is similar to what aspect of a neuron?
resting potential
The ____________________ is/are the functional unit of muscle.
sarcomere
Sensory receptor cells convert a stimulus, such as an odor molecule or light, into an electrical signal that is conveyed to the nervous system. This process is called
signal transduction
Skeletal muscle is
striated and voluntary
The ________________ directs the flow of information between the cerebrum and brain stem.
thalamus
Which of the following options correctly describes the sliding filament model of muscle contraction?
thick and thin filaments slide past each other without changing length
A switch is to a light, as a ____________________ is to an action potential
threshold
