Types of Nerves
A nerve is a bundle of nerve fibers held together by layers of connective
Nerves can be sensory, motor, or mixed,
carrying both sensory and motor fibers.
The routes nerve impulses travel are called pathwa
Nerve impulses travel from neuron to
neuron along complex nerve pathways.
B. The junction between two communicating neurons is called a synapse; there exists a synaptic cleft
between them across which the impulse must be conveyed.
The hypothalamus maintains homeostasis by regulating a wide variety of visceral activities and by
linking the endocrine system with the nervous system.
1.A.1.a. The hypothalamus regulates heart rate and arterial blood pressure, body temperature, wa
1.A. Resting Potential
1.A.1. Due to active transport, the cell maintains a greater concentration of sodium ions outside
and a greater concentration of potassium ions inside the membrane.
The inside of the membrane has excess negative charges, whil
A. Sensory receptors detect changes in the
environment and stimulate neurons to send nerve
impulses to the brain.
B. A sensation is formed based on the sensory input.
Receptors and Sensations
A. Blood, a type of connective tissue, is a
complex mixture of cells, chemicals, and
B. Blood transports substances throughout the
body, and helps to maintain a stable internal
C. The blood includes red
The nervous system is composed of neurons and
1. Neurons transmit nerve impulses along nerve fibers to other neurons. Neurons typically have a cell body,
axons and dendrites.
Nerves are made up of bundles of nerve fibers.
A. The nervous system is composed of neurons and
1. Neurons transmit nerve impulses along nerve fibers
to other neurons. Neurons typically have a cell
body, axons and dendrites.
2. Nerves are made up of bu
A. The lymphatic system is comprised of a
network of vessels that transport body
fluids, the cells and chemicals in those
vessels and the organs and glands that
B. Lymphatic vessels
A. The endocrine system is made up of the cells,
tissues, and organs that secrete hormones into
B. Hormones diffuse into the bloodstream to act
on target cells some distance away.
C. The body has two
1.A.1. The cerebellum is made up of two hemispheres
connected by a vermis.
A thin layer of gray matter called the cerebellar cortex
lies outside a core of white matter.
1.A.3. The cerebellum communicates with other parts of the
A. The cardiovascular system consists of the heart
and vessels (arteries, capillaries and veins.)
B. A functional cardiovascular system is vital for
supplying oxygen and nutrients to tissues and