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week 14 assignment
| What is the basic function of a neuron in nerve signaling? | A neuron receives information, processes it, and sends signals to other cells through electrical and chemical messages |
| What is an action potential? | An action potential is a rapid electrical change across a neuron’s membrane that allows a nerve signal to travel along the axon. |
| Depolarization | The phase during nerve signaling when the inside of the neuron becomes less negative because sodium ions rush into the cell. |
| Autonomic Nervous System (ANS) | A division of the PNS that controls involuntary body functions such as heart rate, digestion, breathing, and gland activity. |
| Somatic Nervous System (SNS) | The part of the peripheral nervous system that controls voluntary movements by sending signals from the CNS to skeletal muscles. |
| Sympathetic Division | A branch of the autonomic nervous system responsible for the “fight-or-flight” response, preparing the body for stress by increasing heart rate, breathing, and alertness. |
| The endocrine system produces | stress |
| The nervous and endocrine systems do what? | act together to coordinate the functions of all body systems. The nervous system acts through nerve impulses conducted along axons of neurons. |
| how many times a day does our heart approximately pump? | Our heart beats 100,000 times a day |
| How much does an average human blood pump throughout the body? | An average human has around 5 liters (8 pints) of blood, which is constantly pumped throughout the body. |
| Which parts are the main parts within the circulatory system? | The heart, blood, and blood vessels combined are referred to as the circulatory system. |