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heyitsmarah
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list the levels of organization in a multicellular organism from smallest to largest
- Cells
- Tissues
- Organs
- Organ system
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Stores mineral reserves and provides a site for blood cell formation.
skeletal
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provides oxygen and removes carbon dioxide
respiratory system
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coordinates the bodys response to changes in internal and external environments
nervous system
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helps to circulate blood and move food thorugh the digestive system
muscular system
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Controls Growth, Development and metabolism: Maintains homeostasis
Endocrine system
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Produces reproductive cells
Reproductive system
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Converts food so it can be used by cells
Digestive system
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Helps protect the body from disease
Lymphatic system
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Brings materials to cells fights infection and regulates body tempature.
Circulatory system
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Serves as a barrier against infection
Integumentary system
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Eliminates waste and maintains homeostasis
Excretory system
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What are four types of tissue found in the human body?
Epithelium, Connective, Nervous, Muscle
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Most abundant tissue in most animals is
muscle tissue
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what kind of tissue covers the surface of the body and lines internal organs.
Epithelial
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What is the process of maintaining a controlled stable internal environment.
Homeostasis
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The process by which the product of a system shuts down the system or limits its operation is referred to as?
Feedback Inhibition
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The part of the brain that monitors and controls body temperature is?
Hypothalamus
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What are the three types of neurons?
- Sensory neurons
- Inter neurons
- Motor neurons
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Motor neurons carry impluses from the brain? True. false?
True . Motor neurons carry impluses from the brain
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True or false? There are more sodium ions in the cytoplasm than the fluid outside the cell.
false
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The difference in electrical charge across the cell membrane of a resting neuron is called?
resting potential
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reversal of charges due to the flow of positive ions into a neuron
action potential
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the minimum level of a stimulus that is required to activate a neuron is called the
Threshold
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the location at which a neuron can transfer an impluse to another cell
synapse
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The central nervous system consist of
the brain and the spinal cord
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three layers of connective tissue is called the...
Meninges
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The two hemispheres of the brain are connected by the
Corpus callosum
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The four lobes of the brain
- Frontal lobe
- Occipital Lobe
- Parietal lobe
- Temporal lobe
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The outter layer of the cerebrum is called the
cerebral cortext
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The two regions of the brain are
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Ganglia, Cranial Nerves and spinal Nerves are apart of..
Peripheral Nervous system
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Somatic nervous system controls the activies of
- lifting a finger
- wiggling the toes
- pulling foot away from tack
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5 General categories of sensory receptors
- Pain Receptors
- Thermoreceptors
- Mechanoreceptors
- Chemoreceptors
- photoreceptos
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Light enters the eye through the cornea
the cornea
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The lens focuses light on
the retina
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The function of the iris is to adjust the
is to adjust the size of the pupil
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The two sensory functions of the ear
- Hearing
- Detecting positional changes
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Vibraitions enter through
The auditory canal
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What we commonly call taste is actually smell. true ? false
True
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The skin contains sensory rceptors that respond to Temperature touch and pain. True? , False?
true
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Cerebrum
Controls voluntary activities of the body
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Cerebellum
Coordinates and balances the actions of the muscles
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Brain stem
regulates the flow of info between the brain and the rest of the body
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Thalamus
Relays messages from the sense organs
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Hypothalamus
Controls hunger, Thrist, anger, and body tempature.
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