Body systems 1 review

What are the levels of organization of an organism?

• Atom, Molecule, Cell, Tissue

• Cell, Tissue, Organ, Organ system

• Organ, Organ system, Population, Community

• Tissue, Organ, Organ system, Ecosystem

What is homeostasis?

• The process of cell division

• The ability of an organism to maintain a stable internal environment

• The breakdown of nutrients in the body

• The growth of an organism over time

What does negative feedback do in an organism?

• Enhances the initial stimulus

• Opposes the initial stimulus, maintaining a balanced internal environment

• Causes rapid growth and development

• Increases the rate of metabolism

What is the nervous system?

• A group of muscles that control movement.

• The network of nerve cells and fibers that transmits nerve impulses between parts of the body.

• A collection of bones that support the body.

• The system that digests food.

What are impulses?

• Chemical signals that travel through the blood.

• Electrical signals that travel along neurons.

• Physical movements of the body.

• Sound waves that travel through the air.

What are neurons?

• Cells that produce energy.

• Nerve cells that transmit impulses.

• Cells that store fat.

• Blood cells that carry oxygen.

How does a neuron send a message?

• By releasing hormones into the bloodstream.

• By sending electrical impulses and neurotransmitters.

• By contracting and relaxing.

• By absorbing nutrients.

What is the function of sensory neurons?

• Carry outgoing information from the brain to muscles

• Communicate internally between sensory inputs

• Carry incoming information from sensory receptors to the brain and spinal cord

• Consist of the brain and spinal cord

What do motor neurons do?

• Carry incoming information from sensory receptors

• Carry outgoing information from the brain and spinal cord to muscles and glands

• Communicate internally between sensory inputs

• Consist of the brain and spinal cord

What is the function of the peripheral nervous system?

• It connects the central nervous system to the rest of the body.

• It consists of the bones of the head and trunk.

• It connects muscles to bones.

• It supports the body's weight.