Biology Lab Quiz 2 (copy)

Central Nervous System (CNS)

Consists of the brain and spinal cord, responsible for processing and decision-making.

Peripheral Nervous System (PNS)

Takes impulses away from the CNS, includes sensory and motor neurons.

Sensory Neurons (Afferent)

Neurons that send impulses to the CNS.

Motor Neurons (Efferent)

Neurons that send impulses from the CNS to the body.

Irritability

The ability to perceive and respond to a stimulus.

Conductivity

The ability to send a message to a body part.

Functions of Muscle Tissue

Muscle tissue contracts (shortens) upon application of a stimulus.

Actin and Myosin

Contractile proteins involved in muscle contraction.

Types of Muscle Tissue

Skeletal, smooth (visceral), and cardiac.

Receptor (Neuron)

Part that picks up a stimulus.

Perikaryon

Body of the neuron.

Spinal Reflex

A reflex that occurs without conscious thought.

Autonomic Nervous System

Part of the nervous system that controls involuntary actions like those in the stomach.

Somatic Nervous System

Part of the nervous system that controls voluntary actions in arms and legs.

Functions of the Nervous System

Controls the body by sending electrical impulses.

Interneurons

Neurons that connect impulses between sensory and motor neurons in the CNS.

Decision Making in CNS

The central nervous system is responsible for making decisions.

Movements of the Body

All movements come from the brain and spinal cord.

Tissue

A group of cells that come together to perform a specific function.

Vascular

Referring to tissues with a significant blood supply.

Function of Connective Tissue

To support, protect, and bind different parts of the body.

Cerebral/Spinal Nervous System

Controls voluntary muscle movements.

Central Nervous System Functions

Processes information and makes decisions.

Function of Neurons

Transmit electrical impulses throughout the body.

Role of Dendrites

Receive impulses and transmit them to the neuron body.

Role of the Axon

Sends impulses away from the neuron to other tissues.

Characteristics of Muscle Tissue

Incorporates contractile proteins and is rich in blood supply.

Muscle Tissue Type: Skeletal

Voluntary muscle controlled by cerebral- spinal ns, striated, long cylindrical shape, multi-nucleated, the flesh that covers our bones

Muscle Tissue Type: Smooth

Involuntary muscle controlled by autonomic ns, visceral, long spindle shape, single nucleus, covers our guts and blood vessels

Muscle Tissue Type: Cardiac

Involuntary muscle, branching, single nuclei, covers the heart, controlled by sa node