PLANT TISSUES (pp 261-268) HOW ARE CELLS ORGANIZED IN PLANTS? I. MERISTEMATIC TISSUES A. APICAL MERISTEMS Primary Growth 1. Initials a. Occur near tips of roots and shoots b. Cells have thin walls‚ prominent nuclei‚ and small vacuoles c. Functions 1) Establish patterns of growth. • Leaf pattern. 2) Produce new‚ genetically healthy cells 3) Produce derivatives which in turn account for primary growth i.e. elongation. 2. Derivatives a. Protoderm - becomes
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ENDOCRINE SYSTEM 1) KNOW ALL OF THE ENDOCRINE GLAND & HOROMONES * Hypothalamus Although it is part of the brain‚ the hypothalamus secretes several hormones and is very closely related to the activity of the endocrine system. * The hormones it secretes are: * Releasing hormones – stimulate the secretion of specific anterior pituitary hormones * Release inhibiting hormones – inhibit the secretion of specific anterior pituitary hormones Pituitary * A small
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PHYSIOEX 9‚ ACTIVITY #3 Review Questions ACTIVITY #1 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out the neuron through the K+ leak channels? 2. Explain why increasing extracellular K+ causes the membrane potential to change to a less negative value. How well did the results compare with your predictions? 3. Explain why a change in extracellular Na+ did not significantly alter the membrane potential in the resting neuron? 4. Discuss the relative permeability
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Endocrine Maintains homeostasis. Ex. Growth rate‚ body temp‚ hunger feelings. Hormone Chemical messenger‚ that secretes into blood by an endocrine gland. Gland Secretes chemical substances used by the body Exocrine gland Secretes chemical substances into a duct Endocrine gland Ductless glands that secrete hormones Target cell Cell on which the hormone exerts an effect Affects of hormones Activation or inactivation of enzymes‚ stimulates mitosis‚ plasma membrane permeability change‚ synthesis
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REVIEW SHEET EXERCISE 11 Blood Analysis NAME: LAB TIME/DATE: Hematocrit Determination 1. Hematocrit values are usually ( *higher / lower ) in healthy males‚ compared to healthy females. Give one possible explanation for this. 2. Living at high elevations will cause a person’s hematocrit to ( *increase / decrease ). Explain your answer. 3. Long-term athletic training will cause a person’s hematocrit to ( *increase / decrease ). 4. What is anemia? Condition where inadequate
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Classification of Tissues Tissue Structure and Function—General Review A group of cells similar in structure and function. 1. Define tissue. _______________________________________________________________________________________ __________________________________________________________________________________________________ 2. Use the key choices to identify the major tissue types described below. Key: a. b c c‚ d a b d c b a a a d connective tissue b. epithelium c. muscle d. nervous tissue 1. lines
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Classification of Tissues Introduction Cells are the smallest units of life. In complex organisms‚ cells group together with one another based on similar structure and function to form tissues .Tissues provide the numerous functions of organs necessary to maintain biological life. This lab exercise seeks to introduce the various tissues found in the human body and to familiarize you with their composition and function. The study of tissues is called histology ‚ and is important to the understanding
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Activity 1 1. Size and concentration of the solute 2. It was too large to pass‚ as predicted 3. I predicted that the glucose would diffuse since it is small enough but the albumin is much too large to pass through the membrane. The experiment produced this result. Activity 2 1. Neither way requires ATP but facilitated diffusion requires carrier protein molecules for diffusion to occur. 2. By increasing the number of carriers more glucose can pass at a time increasing the rate‚
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The endocrine system is very dynamic and has ties to most‚ if not all of the other major systems of the body. It is responsible for production of hormones and the regulation of them as well. These hormones act as chemical messengers within the body. Through several differing mechanisms‚ they are able to trigger very specific responses in target cells or organs. This is what enables the endocrine system to guide growth‚ development‚ reproduction‚ and behavior‚ among many others as well.
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Lab 28B: Endocrine System Physiology Computer Simulation Introduction The endocrine system is the second greatest control system of the body and has many effects on the tissues and organs. The thyroid gland‚ which is a part of the endocrine system‚ releases a hormone that maintains metabolism. This hormone is thyroxine. Thyroxine production is controlled by thyroid stimulating hormone‚ which is released by the pituitary gland. TSH stimulates the thyroid gland to produce thyroxine. In
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