FEEDBACK MECHANISMS AND TISSUES

feedback mechanism

process of nervous and hormonal regulation by which the body maintains levels.

negative feedback

when the receptor detect change and initiate response that will go against the change

positive feedback

process by which stimulus causes a response which will increase the stimulation

negative feedback

Maintenance of homeostasis usually involves?

tissues

group of cells

histology

studies microscopic anatomy of biological tissues

tissue

histos

study

logos

survival

multicellular organisms have higher

decreased

Workload of individual cell has been

epithelial, connective, muscular, nervous

4 types of tissues

epithelial tissue

covering of the surfaces of in and out of the body

squamous epithelium

Thin, scaly-look like, flattened on the surface, fried-egg appearance with rounded nucleus. CIRCLE

cuboidal epithelium

Dice shape, Square-like shape with large and spherical nuclei. Major function is absorption and secretion. SQUARE

Columnar epithelium

Taller rather than wide column in shape, Long and rectangular shape with oblong nuclei or elongated nucleus contain goblet cells.

pseudostratified columnar

False stratification or appearance

cillia

It has fine hair-like projection

simple

one layer

stratified

more than two layers

pseudostratified

made up of one layer of cells but of different heights, thus showing a stratified appearance

sensory

Specialized for reception of stimulus

glandular

Specialized for secretion

germinal

Specialized for production of germ cells

connective tissues

connect the various body organs. Binds parts together. Transports substances. Fills spaces within or between organs

loose connective/areolar

Holds the organs in a particular area; between the skin and muscles

dense/fibrous connective

supports, protects, and holds bones, muscles, and other tissues and organs in place.

osseous

Support, protects, provides lever, storage, hematopoiesis (blood formation)

blood

Connects all systems of the body and transports oxygen, nutrients, and wastes

rbc, wbc, platelets

specialized cell of blood?

adipose

Storage of lipids for energy building. Insulator

hyaline cartilage

Support. Cushion properties

fibrocartilage

Absorb compressive shock

elastic cartilage

Supports parts of your body that need to bend and move to function

muscular tissue

Designed for contraction and movement.

sarcolemma

cell membrane of muscular system

sarcoplasm

cytoplasm of muscular

skeletal muscle

The main function of it is to provide support and protect the soft part of the body. It also gives shape and form to the body.

cardiac

The cardiac muscle is responsible for the contractility of the heart and, therefore, the pumping action

nervous tissue

Is found in the brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities. It stimulates muscle contraction, creates an awareness of the environment, and plays a major role in emotions, memory, and reasoning

neurons

Receives sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.

neuroglia

Acts as phagocytes. Defends the neural tissue from pathogens

soma

The cell body connects to the dendrites, which bring information to the neuron, and the axon, which sends information to other neurons.

dendrites

receive information from other neurons, called pre-synaptic neurons, or from the environment

axon

carry electrical impulses that are the means of communication within the brain and between the brain and the rest of the body

afferent/sensory

direction of the nerve impulse travels to the CNS

efferent/motor

Neurons that carry impulses to the brain to the visceral or muscles and glands

interneurons

Neurons that connect between sensory and motor neurons

neurotransmitters

The signals from pre-synaptic neurons come in the form of